def test_grid_can_have_a_single_cell():
shape = ()
for i in range(10):
shape = shape + (1,)
g = Grid(shape)
assert len(g) == 1
assert g.dim() == len(shape)
assert tuple(g.shape()) == shape
def test_grid_can_be_empty():
g = Grid(())
assert len(g) == 0
assert g.dim() == 0
assert tuple(g.shape()) == ()
